diff --git a/setup.py b/setup.py
index 1a2c3b8..a191e85 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,7 @@ setup(
         'compressor.conf',
         'compressor.filters',
         'compressor.filters.jsmin',
+        'compressor.filters.cssmin',
         'compressor.templatetags',
     ],
     package_data = {